Improvement in sash stop and lock



H. A. CROSBY 8: M. W. THOMPSON,

G. F. THOMPSON, Jn, Admr of M. W. THOMPSON, decd. Sash Stop and Look.

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WITNESSES INVBNTOR $11M flrc/a /Z fl 6Ma/ ATTORNEYS.

N. PETERS. PHOTD-LITHDGRAFHER. WASHhfGTON. D c,

UNITED STATES PATENT OFFICE.

HARTVVELL A. CROSBY AND GEORGE F. THOMPSON, JR., (ADMINISTRATOR OFMICHAEL W. THOMPSON, DEOEASED,) OF ST. JOHN, N. B.

IMPROVEMENT IN SASH STOP AND LOCK.

Specification forming part of Letters Patent No. 220,809, dated October21, 1879 application filed March 28, 1879.

- Similar letters of reference indicate corre sponding parts.

The object of this invention is to provide a more simple and durablesash stop and lock than any of those now in use.

The invention consists of the shield A, that carries the hook B, and isfastened on the lower part of thesash C. A quarter-inch hole (orthereabout) is bored through this part of the sash from its side to thecenter, where the shield is attached, and through this hole the rod D ispassed. One end of this rod enters the eyes of the two lugs to a, thatproject rearward from the shield, and also through the eye of thethumb-piece E, that is located between the lugs to ,a, and as the rod isround where it enters the eyes of the lugs a a it turns readily in them,while, being square where the thumb-piece is fitted on it, it may beturned by the thumb-piece.

A bent spring, F, whose function is to keep the thumb-piece pressedupward, and consequently the pawl H engaged in the rack I, has one endfastened in the upper edge of its rear portion, while the free endpresses against the inside face of the shield.

Set within the edge of the sash is the box or look G, made in two parts,that are held together by pins or screws, as shown. Into this look theother end of the rod D is projected, and carries on its square shoulderthe pawl H.

When the thumb-piece E is held up by the spring F the pawl H engages inthe rack I, that is fastened on the inner edge of one of the frontsash-stops, and thereby holds the window-sash in whatever position itmay be placed, preventing it, too, from rattling or jarring. By pressingdown on the thumb-piece the pawl is disengaged from the rack, and thewindow-sash may be pulled down and closed, and then, when released, thepawl will enter the deep cut or hole 0 in the rack and hold the windowdown, so that it cannot be opened from the outside.

Wishing to close a window provided with this device, one has only toreach up and pull down on the thumb-piece. If the window be partly openand it is desirable to raise it higher, one has only to push it up, andthe pawl will hold it at any point.

All the parts of this device except the spring are preferably made ofbrass, nickel-plated or bronzed.

Having thus described the invention, we claim as new and desire tosecure by Letters Patenti A sash-fastener consisting of the shield A,having lugs to a, the hook B, the thumb piece E, the rod D, the springF, the pawl H, and the rack I, all arranged substantially as shown anddescribed.

HARTWELL ALEXANDER CROSBY.

GEORGE FREDERICK THOMPSON, J R.,

Administrator of Michael W. Thompson.

Witnesses:

GEO. E. FAIRWEATHER, A. O. FAIRWEATHER.

